Plaster base



0d. 6, 1936. H MARKS 2,056,288

PLASTER BASE Filed July 25, 1935 W/T/VLUES INVENTOR.

MM. v BY mw d A; ATTORNEYJ.

Patented Oct. 6, 1936 UNITED smarts AT OFFICE PLASTER BASE Herbert E. Marks, Sewickley, Pa.

Application July 25, 1935, Serial No. 33,085

10 Claims.

slabs are likely to be crushed, cracked, or otherwise damaged when the netting is attached by fastening members, such as staples. been found that when plaster is applied directly to the smooth surface of a plaster board throughout its area the wall is not as strong as desired, and it may not be capable of resisting impacts to which it may be subjected. On the other hand, in walls that are surfaced with wire-backed or reinforced paper the wire projects through the paper support at intervals, whereby the entire surface area of the paper is not covered with wire netting and the plaster can not be as firmly attached to the paper support as desired.

It is among the objects of this invention to provide a plaster base which is pre-fabricated, which is inexpensive to produce, which securely supports plaster over the entire area of the base as well as at the joints in a wall, which forms a strong reinforced wall, and in the manufacture of which the component parts are not subject to damage.

The preferred embodiment of the invention is illustrated in the accompanying drawing in which Fig. l is a front View of a plaster base; Fig. 2 is a rear View thereof; and Fig. 3 is a fragmentary side view of a wall formed from plaster bases like the one shown in the preceding figures.

Referring to Figs. 1 and 2 of the drawing, on one surface of a slab of wall board or plaster board I a foraminous metal member such as wire netting 2 or the like is mounted. If netting is used, it may be of any suitable form, such, for example, as two inch square mesh, and the wires forming the mesh are preferably large and rigid enough to securely key plaster to the board without sagging.

The area of the netting is greater than that of the slab, and the netting is securely attached to the slab at the factory in any suitable manner, preferably by bending the projecting ends 3 of some of the wires around the edges of the slab and into engagement with the rear surface thereof (Fig. 2). This is a quick and easy way to fasten the netting to the slab without injuring the slab in any way, as might possibly be done if staples or the like were driven through it and clinched.

Preferably, all of the wires projecting beyond two meeting edges of the slab are bent around those edges in the manner described, but the netting is allowed to extend outwardly beyond the It has also remaining two edges of the slab so that it will overlap the adjoining edge-portions of contiguous slabs forming a wall facing, as shown in Fig. 3, and provide a plaster reinforcement at the joints between the slabs. At intervals some of the netting wires projecting outwardly in this manner are cut and bent back around the underlying edges of the slab to fasten the overlapping edgeportions of the netting to the slab.

A plaster base constructed in accordance with this invention is relatively inexpensive because no fastening members are required for connecting the netting and slab together, and because it is' pre-fabricated so that the expense of attaching wire netting to the slab at the building site is eliminated. A further saving is effected due to the fact that slabs are not injured in attaching the wire nettings thereto. The entire slab is covered by the netting, and all of the netting is exposed where it can reinforce the plaster and hold it against the slab. Furthermore, when these plaster bases are assembled in a wall the joints between the slabs are likewise covered by wire netting. This plaster base utilizes the advantages of a plaster board, among which are its use as a stiffening element and as about three-eighths of an inch of plaster, together with the advantage of the reinforcement of the entire board and the joints between boards brought about by connecting a foraminous metal member to one side of the board throughout its entire area.

According to the provisions of the patent statutes, I have explained the principle and construction of my invention and have described what I now consider to represent its best embodiment. However, I desire to have it understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

1. A pre-fabricated plaster base comprising a slab of plaster board and a foraminous metal member disposed against a face thereof throughout the area of said face and connected to said slab, said foraminous member projecting outwardly beyond not more than two edges of the slab, whereby when a plurality of said slabs are disposed edge to edge to form a wall facing said outwardly projecting portion of said foraminous member overlaps the adjoining edge portions of contiguous slabs.

2. A pre-fabricated plaster base comprising a slab of plaster board and a foraminous metal member disposed against a face thereof throughout the area of said face and connected to said slab at its edges, said foraminous member projecting outwardly beyond only two meeting edges of the slab, whereby when a plurality of said slabs are disposed edge to edge to form a wall facing said outwardly projecting portion of said foraminous member overlaps the adjoining edge portions of contiguous slabs.

3. A pro-fabricated plaster base comprising a slab of plaster board and a foraminous metal member disposed against a face thereof throughout the area of said face, two meeting edge portions of said foraminous member being bent around the contiguous edges of said slab to connect the member thereto, and the other two edgeportions of said member extending outwardly beyond the slab edges, whereby when a plurality of said slabs are disposed edgeto edge to form a' wall facing said outwardly projecting portion of said foraminous member overlaps the adjoining edgeportions of contiguous slabs.

i. A pre-fabricated plaster base comprising a slab of plaster "board and a wire netting disposed against one face thereof throughout the area of said face, some of the wires of said netting being bent around the edges of said slabjto connect the netting thereto, and others'of said wires extending outwardly beyond only two meeting ed es of said slab, whereby when a plurality of said slabs are disposed edge to edge to form a wall facing said outwardly" extending wires overlap edgeportions of contiguous slabs.

5i Apre-fabricated plaster base comprising a slab of plaster board and a wire netting disposed against one face thereof throughout the area of said'face, some of the wires of said netting being bent around the edges of said slab to connect the netting thereto,' and others of said wires extending'outwardly beyond two meeting edges of said slab.

6. A plaster-supporting wall structure comprising a'plurality of slabs of plaster board disposed edge to edge to form a wall facing, a foraminous 'metal member mounted on the outer surface of each of said slabs and extending outwardly beyond two meeting edges thereof to overlap edge-portions of contiguous slabs, said foraminous member being connected to the slab on which it is mounted.

7. A plaster-supporting wall structure comprising a plurality of slabs of plaster board disposed edge to edge to form a wall facing, and a wire netting mounted on the outer surface of each of said slabs and extending outwardly beyond two meeting edges thereof to overlap edge-portions of contiguous slabs, said netting having some of its wires bent around the edges of the slab on which it' is mounted for attaching it thereto.

8. A plaster-supporting wall structure comprising a plurality of slabs of plaster board disposed edge to edge in adjoining relation to form a wall facing, and a wire netting connected to the outer surface of each of said slabs and extending outwardly beyo d o w me in ed thereof to overlap edge-portions of contiguous slabs.

9. A plaster-supporting wall structure com prising a plurality of slabs of plaster board disposed edge to edge in adjoining relation to form a Wall facing, and a wire netting connected to the outer surface of each of said slabs and extending outwardly beyond only two meeting edges thereof to overlap edge-portions of contiguous slabs.

10. A pre fabricated plaster base comprising a slab of plaster board and a wire netting disposed against one face thereof throughout the area of said face, said netting projecting outwardly beyond an edge of the slab, and some of the Wires in said'outwardly projecting portion being bent back around the underlying edge of the slab to connect the netting thereto along that edge.

" HERBERT E. MARKS. 

